Specifications
Chapter 6
Troubleshooting
6-1 INTRODUCTION It is strongly recommend that any MS462XX Vector Network Measure
-
ment System repair be performed by qualified technical personnel only.
Refer to Section 1-8 for a listing of spare parts mentioned in this chapter.
Contact your nearest Anritsu Customer Service or Sales Center for price
and availability information. See Chapter 7 for specific module removal
and replacement instructions. Refer to the MS462XX Vector Network
Measurement System Operation Manual (10410-00203) for the specific op
-
erating instructions referred to in these procedures.
This chapter provides procedures to accurately define and isolate the
fault to a specific assembly or module.
An aide to troubleshooting instrument failures is a good understanding of
the system and subassembly operation. Refer to the descriptions of sys-
tem and subassembly operations and block diagrams located in
Chapter 2—Theory of Operation.
Accurately defining a fault is the most important step in troubleshooting
an instrument. The fault symptoms should be noted by performing a
functional test on the system, as explained in Chapter 3—Operational
Performance Tests.
Faults can be categorized as the following:
q
Hardware problems
q
Software problems
q
Measurement problems
6-2 SELF TEST The VNMS has two self tests:
q
Short self test at initial bootup
q
Extended self test within the Diagnostics menu.
Both self tests display either Pass or Fail on the VNMS display upon com
-
pletion Each self test failure will add the appropriate failure information
to the Service Log.
The short self test at bootup performs the following tests:
q
Communication with the Source(s), Options board, and Receiver
Board
q
CPU power supply voltage regulation
q
Test of CPU lithium battery (found only on BMS software version
1.16 and above)
MS462XX MM 6-3
CAUTION
The procedures in this
chapter should be
performed by qualified
technical personnel
only. These procedures
may require access to
internal components,
and care should be
taken to avoid contact
with potentially
hazardous voltages.